What is an FZZ file?
An .FZZ file is primarily known as a Fritzing Shareable Project File. Fritzing is an open-source software tool that helps users design electronics and circuit boards. The .FZZ file stores the complete electronics project in one file. It holds the breadboard layout, schematic details, printed circuit board (PCB) design, and any custom parts. Under the surface, an .FZZ file uses the standard ZIP compression format. It bundles an uncompressed .FZ project file and custom assets together.
How to open FZZ files?
The standard method to open an .FZZ file is with the Fritzing desktop application. Because the file is a ZIP archive, you can also rename the .FZZ extension to .ZIP. You can then extract it using standard archive tools like 7-Zip to see the internal files.
Software and tools
While Fritzing is the main tool, viewer.online/fzz analyzes .FZZ files to identify their exact format and creator software, shows which programs can open the file, and usually previews it. If your .FZZ file has a different origin, this tool will help you identify the actual format of your file.
Summary
Because .FZZ files use the known ZIP format, viewer.online/fzz can safely open and display them online, eliminating compatibility problems.